Grease gun conversion unit



July 22, 1958 W. H. BRANDT ET AL GREASE GUN CONVERSION UNIT 2Sheets-Sheet 1 Filed Aug. 10. 1956 m n mmfi w V r m 4m H .o m MT m T M.n n

July 22, 1958 w. H. BRANDT ET AL 2,844,287

GREASE GUN CONVERSION UNIT 2 Sheets-Sheet 2 Filed Aug. 10. 1956INVENTOR. W/l/id/n /7- Branch BY Ear/ fl Half/n I HT ORNEY United StatesPatent GREASE GUN CONVERSION UNIT William H. Brandt, Emerson, Nebn, andEarl H. Martin, Sioux City, Iowa Application August 10, 1956, Serial No.603,383

4 Claims. (Cl. 222-326) Our invention pertains to a grease gunconversion unit.

An object of our invention is to provide a simple unit which can be usedin combination with the conventional type of grease gun, and whereby inone form, the extra cumbersome parts of the grease gun need not be used.

A further object of our invention is to provide a simple arrangementwhich can be readily attached to standard grease guns, and wherein byeliminating the above mentioned cumbersome parts, the filling of the guncan be made much simpler. a

A further object of our invention is to provide a simple cartridgearrangement for use with such grease guns.

A further object of our invention is to provide a simple constructioncapable of easy manufacturing' With these and other objects in view, ourinvention consists in the construction, arrangement, and combination ofthe various parts of our device, whereby the objects contemplated areattained, as hereinafter more fully set forth, pointed out in ourclaims, and illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal section taken of a grease gun with ourarrangement incorporated therein,

Figure 2 is a detail of the cylindrical grease container carton,

Figure 3 is an enlarged detail, 1 Figure 4 is a sectional view of amodification, Figure 5 is a detail of a cartridge,

Figure 6 is a modification, and Figure 7 is a further modification. Wehave used the character 10 to designate the cylin drical barrel of astandard grease gun, this barrel usually being threadably engaged at 11with the usual threads 12 of the standard head portion 13, to which isattached the spout 14 having the nozzle end 15. The member 13 includesthe opening at 16 communicating with the ball valve 17, the member 13also-including the rod 18 and piston 19, the rod 18 being pivotallyconnected at 20 to the handle 21 which is pivotally connected at 22 tothe link 23 which acts as a bracket for supporting the arm 21 and allowspivotal movement thereof, and it should be specifically understood thatthese various members are the usual standard members of such guns.

Threadably engaged at the rear of the barrel 10 is the cap member 24. Inthis standard type 'of gun there is usually provided a rod which passesthrough the opening 25 in the cap 24, this rod being attached to asuitable washer or piston which is adapted to reciprocate within thebarrel 10 and also includes a compression spring receiving this rod witha handle being attached to the rod, so that when it is desired to fillthe barrel 10, this above described assembly and the barrel must beremoved and held in a retracted position while the barrel is beingfilled, thereby providing a rather cumbersome arrangement which isdifficult to operate and which results in inconvenience to the operator.

Our invention anticipates the elimination of such a cumbersomearrangement, and in our form of the device, this assembly of the washer,spring, etc.-, are completely 2,844,287 Patented July 22, 1958 "iceremoved and the members about to be described are provided.

To provide this improved feature, we provide a cylindrical member 26'having the annular flanged integral portion 27 which portion 27 includesthe threads at 28, which threads 28 are screwed into the threads 12 ofthe portion 13, and next the barrel 10 is screwed inwardly into the samethreads 12 and as shown in Figure l, which will provide means for firmlysupporting the cylindrical member 26 which is open at both ends.

It will be noted that the cylindrical member 26 is of such diameter asto leave an annular cylindrical space 28a between the member 26 and thebarrel 10.

For providing the grease units, we provide a cylindrical pasteboardmember 29 having the rear end cap 30 and the forward recessed cap 31'having the annular flange 32, a pull tab 33 being attached to the cap 31to render easy removal thereof.

The device is used in the following manner. After the assembled rod,washer, and spring have been completely removed, the unit is thenattached so that it will appear as shown in Figure l, and then one ofthe units 29 is opened by removing the forward cap 31, and thecylindrical portion 29 of the carton is placed into the space 28a andforced toward the head 13 so that as a result the grease 34 will beforced into the member 26. This is the priming operation to initiate theaction of the gun, and next, a further carton is employed (after the cap30 or the first priming member 29 is used) with the cap 31 being removedand with the ends of the member 29 being placed in the space 28a aslight distance, since the space left by the flanges 32 will permitthis,

and the gun is then ready for operation. By oscillating the handlebackwardly and forwardly in the direction of the arrows 35, the actionof the piston 19 and the ball 17 will provide means whereby the greaseis first pumped past the ball 17 toward the opening 16 and is thenforcedthrough the opening 16 into the spout 14 when the ball closes the valve,so that as a result, the successive pumpour invention wherein theretractable plunger commonly used in such greaseguns is used, with theexception, however, that a cartridge form for containing the grease 'isalso used to eliminate the inconvenient method of filling the barrel,and in this form of structure identical characters will indicateidentical portions as illustrated in Figures 1 to 3 inclusive.

For this purpose we provide a longer carton, indicated generally by thecharacter 36, it being understood that" this carton can be of anydesired length, althoughit' should substantially fill the length of thebarrel 10.

In the form of device, we use a small cylindrical member 37 having thetapered portion 33, the member 37 having the flange portion 39threadably engaged at 40 with the threads 12 of the standard headportion, the diameter of the member 37 being lesser than the diameter ofthe barrel 10 to accommodate the end of the carton 36 when the capmember 31 is removed, it being noted that the cap member will be thesame as the cap member shown in Figure 2, the carton 36 also includingan identical cap member such as 30. The cylindrical walls 41 of thecarton 36 can include the tapered ends at 42 to allow the easy entranceof the piston or leather washer 43, which is the standard constructionemployed in the gun, and in this form of structure, the character 44will designate the plunger rod, the character 45 indicating the handle,and positioned between the cap 24 and the plunger is the helicalcompression spring 46', this arrangement thereby providing means forproviding pressure against the grease when the handle is released.

In using this type of the device, the rod 44 is pulled outwardly in thedirection of the arrow 47 and the arrangement is locked in the usualmanner, and next, the caps 31 and 30 are removed from the cartridge 36,which cartridge already contains the grease, and the cartridge is theninserted, with the end of the cartridge being snugly adjacent to thecylindrical member 37, the tapered shoulder 38 permitting the cartridgeto slide easily there on, and by virtue of this snug engagement, thearrangement will be relatively air-tight, and the barrel can then bescrewed on to the threads 12. The rod .44 is then released, whereby thewasher '43 will enter into the cartridge 36 and the arrangement is readyfor operation in the usual manner. It will thus be noted that aconvenient device is supplied which allows convenient and ready fillingof the gun without the messy or cumbersome old arrangement. When thewasher 43 abuts against the end of the member 37, it will indicate tothe operator that the cartridge is emptied.

Figure 6 illustrates a slight modification wherein the head 13 includesan integral cylindrical member 48 formed therewith which will-thereforeprovide the same function as the other arrangement.

Figure 7 illustrates a further modification wherein the cylindricalmember 37 includes a tapered shoulder 49 and with the cartridge walls 50being inserted within the member 37, it being understood that eitherform can be used, and preferably the form shown in Figure 4.

1-It will now be seen that we have provided the various advantages setforth in the objects of our invention with various other advantagesbeing readilyapparent.

Some changes may be made in the construction and arrangement of theparts of our invention without departing from the realspirit andpurposeof our'invention, and it is our intention to cover by our claims anymodified forms of structure or use of mechanical equivalents which maybe reasonably included within their scope.

We claim as our invention:

1. In combination with a standard grease gun having a barrel portion,and a forward nozzle portion, a .conversion unit for reception into saidbarrel comprising a cylindrical grease receiving member, said memberbeing detachably connected to said forward nozzle portion, a cylindricalcarton containing grease, said cylindrical grease receiving member beingof lesser diameter than said barrel to thereby provide an annularcylindrical space therebetween, the walls of said carton being receivedin said space when the contents of said carton are thrust forwardly intosaid grease receiving member, said cylindrical carton beingapproximately the length of said barrel,

and a reciprocating piston in said barrel portion of said.

cylindrical grease receiving .member, said member being detachablyconnected to said forward nozzle portion, a cylindrical cartoncontaining grease, said cylindrical grease receiving member being oflesser diameter than said barrel to thereby provide an annularcylindrical space therebetween, the walls of said carton being receivedin said space when the contents of said carton are thrust forwardly intosaid grease receiving member, said cylindrical carton beingapproximately the length of said barrel, and :a reciprocating piston insaid barrel portion.

of said gun being adapted to be received within said carton, saidcylindrical grease receiving member being of limited length compared tosaid carton.

3. In combination with a standard grease gun having a barrel portion,and a forward nozzle portion, a conversion unit for reception into saidbarrel comprising a cylindrical grease receiving member, said memberbeing detachably connected to said forward nozzle portion, a cylindricalcarton containing grease, said cylindrical grease receiving member being.of lesser diameter than said barrel to thereby provide an annularcylindrical space therebetween, the walls of said carton being receivedin said space when the contents of said carton are thrust forwardly intosaid grease receiving member, said cylindrical carton beingapproximately the length of said barrel, and a reciprocating .piston insaid barrel portion of said gun being adapted to be received within saidcarton, said cylindrical grease receiving member being of limited lengthcompared to said carton, said cylindrical grease receiving member havinga tapered annular shoulder for freely receiving the end of said carton.

4. In combination with a standard grease gun having a barrel portion,and a forward nozzle portion, a conversion unit for reception into saidbarrel comprising a cylindrical grease receiving member, said memberbeing detachably connected to said forward nozzle portion, a cylindricalcarton containing grease, said cylindrical grease receiving member beingof lesser diameter than said barrel to thereby providean annularcylindrical space therebetween, the .walls of said .carton beingreceived in said space when the contents of said carton are thrustforwardly into said grease receiving member, said cylindrical cartonbeing approximately the length of said barrel, and a reciprocatingpiston in said barrel portion of said gun being adapted to be receivedwithin said carton, said cylindrical grease receiving member being oflimited length compared to said carton, said cylindrical greasereceiving member having a tapered annular shoulder for freely receivingthe end of said carton, said carton including .a recessed forward endcap to provide means for entering said carton between said cylindricalgrease receiving :member and said 'barrel, said carton including a rearcap, the :rear end .of said carton having a tapered portion forproviding convenient entrance of said piston.

"References Citedin the file of this patent UNITED .STATES PATENTS2,271,261 Hunt Jan. 27, 1942 2,512,178 Sherbondy June 20, 1950 2,602,571Sherbondy July 8, 1952 2,629,517 -Sl0blIl Feb. 24, 1953

